Ship log



J. WALKER June 2, 1931.

SHIP LOG Filed Jan. 7, 1929 3 Sheets-Sheet l MN AN *wm E wm WMV/7 QN Nm mm a. .N .m

Wal?? June 2, 1931. J, WALKER' 1,808,697

SHIP LOG` Filed Jan. 7, 1929 3 sheetssheet 2 Jlm 2, 1931. J WALKER 1,808,697

` SHIP LOG Filed Jan. '7, 1929 5 Sheets-Sheet 3 Patented June 2, 1931 UNITEDV "s'rAri- =:sv

'JEFFERY WALKER or Bin-ummm, @Neuere snip roe l Y Application niedianuary 7, 1929, serialize. aaoeeo, am; meres; Brvimiz'naiveniger` e, ieee,

This invention relates to ship-logs and it refers more especially tothose which are mounted on the tarail and in an exposed position. It is also applicable to bridge logs.

Being relatively inaccessible, taflrail logs are frequently neglected and owing to absence of regular lubrication the mechanism wears out andbecomes inaccurate, this wear 4often being accentuated vby grit and water f' 10 that enter the casing byway of the lubricatf`l5 inthat the oil linds its way ing aperture which is leftuncovered. To counteract possible omission to attend to the log regularly the casing is sometimes illed Vwith oil, but this practice is disadvantageous to the frontof the dial and fouls it. v

i This invention aims to overcome these ob- Y jections andlto provide a watertight log capable of running for lengthy periods in an' 20 exposed position .without attention and wherein the Wear of theparts is not ailfected by the location of the log; a further object of the invention beingto enable the reductiongearing to be readily removed andre-A placed in case of necessity. f

Accordingly the invention provides a shiplog, primarily for fixing ron the taffrail or other similarly exposed position, wherein the reduction gearing is housed independently of the'indicator movement and dial in discon- `nectable 'association within a casing which constitutes a watertight yenclosureV wherein lthev reduction gearing runs permanentlyin oil'and the indicator movement and v dial are located in a. separatecompartment to which the oilhas no access. 1 The mechanism is thus divided between an element containing the fast-running parts subjeotedto the most wear, and anA element o containing the slowly-running or nonfwearing parts, the two being adapted to be op,- eratively 'united by assembly within lsaid casing. w VV For example, part of said teasing mayac'- commodate a mounting supporting .theprimary spindleand its bearing and also sup.- porting vthe iirst reduction gearing to which the primary spindle 'is 4coupled detachably in the usualmanner; whilethe other prtof said casing, .which may be'forined integrally with or beV screwedto or otherwise arranged co-axially of the first part, `maycontain the indicator-movement which may be so mounted that a partition `fixed in "said Vpart ofthe lcasing prevents access-of oil thereto,meansv 'minate in a universal 1j oint `'or otherwise suitably to enable the primaryspindle to project gat'the'A requisite angle towardsthe "rotator line. f

in the accompanying. drawings, wherein `Figure iis a longitudinal section, and Fig,- v

ureQ is a side elevationoi a tariff-ail 10g the 'latter showing the reduction gearingwthdrawn from the casing@` Y, Figure 8 is asectional elevation 'et a construct-ion for a bridge logythe reduci/lungen! ing'being shown withdrawn from theCasing` o asin Figure Q.'

Referring'rstly to Figures l and 'A2, "the logyeomprises-a cylindrical casing lrbared in the known -Inanner by a gimlal pedestal 2 adapted to be securedl suitably upoua shpfS tallied, which casingl `isl formed with an integral circular flange 3 of larger diameter than the casing. towhich 'flange a tubular. housing 4 is secu-red byset screws 5,. a bezel 6 4being attached las usual to the flanged BOIL' endV of the housing 4 te retain the usual yglass front of the log. y f v 7 and 8 are indicator pointers which move over appropriate scales marked on the face of a dial 9,A the pointers being actuated by a' suitable movement indicated omprhensiwl1y by the numeral 10 and ,carried bve circuler base-plate 11 which Ais seeured' .by screws 12 in anioiltight manner 'to the/1i Shouldli?) formed integrally with' the tubular Casing'jl- Two constructional:embodimentsof the vention are-illustrated, by .way'of example,

'The driving' .spindle for the indicator movement l@ terirlzinates in aflattnefl Spiget plate 11, and

18; said gland 25 serving to axially rearwardly of the baseadapted to be connected operativelywith the reduction gearing interposed between it and the primary spindle Yof the log.

15 is the aforesaid primary spindle which is provided with the usual eye 1 6 for the attachment theretoof thelog line, and this 14 proj ectino' spindle 15 is carried in anti-friction bearings y 17, 17, arranged within the tubular extension or cage 18 of a cap or end `piece 19 adapted" to be screwed into the smaller endof the casing 1.

- The reduction gearing, which is'necessary` 15 and the reduction gearing-2O is eected byv a bifurcated end .26o'n :spindle 15 engaging y a flattened spigot v27 Aon. the irstspindle of the reduction gearing 20.' It 'will bevseen thatthe reductionjgearing 20 `can therefore easily be disconnectedl when; necessary, from l the primary spindle 15.

The last spindle of vthe reduction gearing Y2O is formed witha bifurcated end 28-which y is adapted to engage the'flattened'spigot 14 Vprojecting from the indicator movement.

By reference to Figure'2 it will be-clear that the logmechanism is;divided into-two separable units, that is to say, thercasmgs 1 and4 containingr therslowsrunnlng indi- 'ca'tor movement,` andthe-cage 18 and cap y 19 supporting the fast running reduction gearing 20;.the latter therefore being with- Y drawable bodilyfrom the chamberl29 lconsti- Y. tuted by the forward portion of the casing 1. This'chamber 29 is adapted to be filled f with lubricant wherein the reduction -gearing runs and which is prevented by the base plate 11 from entering the housing 4 and fouling the indicator dial9. r

The bridge log illustrated inl Figure 1s mechanically similar to the log described with reference tohFiguresAl and 2, and comprises ak tubular body or casing29 yfitting slidably' through la .flanged collar- 30 pro- Y videdvwith screwholes 31for its attachment toa suitable part of the bridgestructure, and secured to said collar by 'a flynnut30A, ythe casing 29 Vhaving secured to itsfront end by screws 32 theflanged back-33 of a `casing 34 containing vthe indicator movement 10 and fitte'd'fwith a bezel 35and glass rfront to enclose the pointers 7 andi8 and the dial 9; the

' movement 10 being mounted," as before, on

a circular baseplate 11 attached by screws 12 in an oiltight manner to the back of the casing 34.v v

Aflattened spigot 14 projects, as before, rearwardly through the circular baseplate 11.

A The .reduction gearing 20 is mounted on plate21 and the last spindle of the gearingl has the forwardly projecting bifurcated end 2, as before, for engagement with the spigot l The plate 21 is carried by a circular member 36 connected to a universal joint 37 which is surrounded by a screw-threadedring 38 adapted to screw cn` to the similarly threaded end 39 of the body or casing29. .It will be seen that a completely watertight and grit-proo-f casing isprovided forthe log mechanism which is therefore subjected only to that wear which is due to normal use,

andi-hat` by separating physically the two types of gearing and providing a detachable connection therebetween it is a matterof ease to remove bodily a worn reduction; gearing and to substitute a new mounting and gearing without disturbing the indicating movement. Finally, notwithstanding that the lirst reducton gearing runs in oil, there -is no possibility of leakagerof oil throughto and f y Y' con-sequent fouling of the dial. l

What I claim isfy 1. A ship logl comprising an elongated open ended casing, a log indicator mechanism vsecured bodily to one end of the-casing'and 100 'i having its driving ,spindley extended .-within the-casing, a primary log. spindle and reduction gearing operated thereby, means'supportingsaid primary log-spindle and reducing gearing Vand received bodilyvth'erewith within theL casing through the other endof the latter, saidgearing having means Adetachably engaging the extended-portion 'of Ioy Y the driving spindle of the log indicating mechanismA for operating `the same.v

2. A ship log comprising anl elongated open ended casing, a log indicator mechanism secured bodily toone endof the casing.' and havingits Vdriving spindle extended -within` the casing, a primary logspindle-and` reduction gearing operated thereby, `V`means adapted to be detachably secured to the other f end of the casing and unitingv said spindle y and gearing together Vfor bodily introduction into and withdrawal from the casing as a unit, and means 'operatively associatedi with if said gearing and adapted' to lhave detachyable connection with the extended yportion of the driving spindle of the log indicator mechanism for Voperating the same.

nism secured bodily -to one end of the casing and -having its rdriving spindle extended Vwithin the casing,a cap removably received upontheY other end of the casingV and nor- 3.'A. ship log -comprising an elongated openended casingg,l a log 'indicato'rrmechamally closing the same, a primary log spindle and reduction gearing operated thereby, said primary log spindle and reductionV gearing being carried bodily by said cap for introduction into and Withdrawal from the casing Y as a unit, said gearing having means adapted to detachably engage the yextended portion of the driving spindle of the log indicator mechanism for operating the same. Y

Y 4. A ship log comprising an elongatedopen ended casing, a log indicator mechanism secured bodily to one end of the casing andV having its driving spindle extended Within the casing, a cap removably received upon the other end of the casing, a primary spindle projecting through the cap and having bearj ing therein, reduction gearing carried by said cap, means having detachable connection with said primary log spindle and operatively connected tol said gearing for driving the latter, and other means actuated by said gearing and having detachable connection Wit-h the extended portion of the driving spindle of the log indicator mechanism `for operating the same. Y

5. A ship log comprising an elongated open ended casing, a plate detachably secured to; one end of the casing and normally closing the same, a log indicator mechanism supported by said plate and having its driving spindle extended through the plate Within the casing, a cap removably received upon the other end of the casing, a primary spindle n Y projecting through the cap and having bearn ing therein, reduction gearing carriedby p said cap, means having detachable connection Y With said primary log spindle and operatively connected to said gearing for driving thel latter, and other means actuated by said' gearing and having detachable connection l with the extended portion of the driving spindle of the log indicator mechanism for operating the same.

In testimony whereof he aiixeshis signature. Y

JEFFERY WALKER. 

